Hello! I have just discovered this website, and this thread. I have seen some replies that have been here since 2014, wow! I have a quite a few CRTs, and I decided to start with my 1991 Sport!
I found this little thing in grandfathers garage. I think it has been sitting for 10+ years. I remeber playing around with it when I was a child, and it even turned on and detected channels with its antenna (which is now long gone). It was in the same spot in the garage back then too.
So, I spend months convincing my parents to let me get it, and I did. Sadly, its power cord was cut.
It did have DC input, and I could use a power brick with it, but my parents were unsure of its condition, thinking it might short circuit.
I manage to find a guy who has been fixing tech for decades, and he fixed it up for me though. It's still kicking, seemingly with no issues.